Momentum

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Momentum
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Explain what is happening in the picture

• Why did the blond-haired kid miss getting the
  chips?
• What does the kid need to do in order to get the
  chips?

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Momentum

• Depends on an objects mass and the objects
  velocity.
• The amount of momentum NEVER changesit is just
  transferred to another object.
• p m x v (p momentum)

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Examples of objects with momentum

• A car driving down the road
• A person running
• A wrecking ball
• A frisbee in the air
• A football player tackling another player

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Solving for Momentum

• p m x v
• Units are kg m/s
• kg is from MASS (m)
• m/s is from VELOCITY (v)

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Example

• What is the momentum of a 6 kg bowling ball that
  is moving at 10 m/s down the alley toward the
  pins?
• 6 kg x 10 m/s 60 kg m/s

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Another Example

• An 85 kg man is jogging with a velocity of 2.6
  m/s North. Nearby, a 65 kg girl is skateboarding
  and is traveling with a velocity of 3 m/s South.
  When they collide, who is hit with more momentum?

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Answer

• Mans momentum 85 kg x 2.6 m/s
• 221 kg m/s
• Girls momentum 65 kg x 3 m/s
• 195 kg m/s
• The girl is hit with more momentum! OUCH!!!

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Law of Conservation of Momentum

• Any time objects collide, the total amount of
  momentum stays the same. Momentum cannot be
  lostonly transferred!!

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Examples

• Pool balls colliding on a pool table
• Bumper cars
• Boxing
• A dog running into a wall